| Pinto Angel Ltd | Other services | 2024 |
| Pipeologist Ltd | Construction | 2026 |
| Piravish Enterprises Limited | Administrative & support | 2018 |
| Pixel Forge AI Labs Ltd | Information & communication | 2026 |
| Pixelmart Ltd | Wholesale & retail | 2025 |
| Piyu Limited | Health & social care | 2016 |
| Pizza Maria Ltd | Hospitality | 2015 |
| PK Carpentrybuild Limited | Construction | 2023 |
| PL Accident Claim Management Limited | Professional & scientific | 2010 |
| Platinum Homes Ltd | Real estate | 2024 |
| Playdates Ashford Ltd | Hospitality | 2024 |
| Playing With Boundaries Limited | Education | 2023 |
| Plnco Ltd | Construction | 2025 |
| PMJ Global Limited | Extraterritorial | 2024 |
| PMO Corp Services Limited | Professional & scientific | 2017 |
| PNS Developments Limited | Construction | 2021 |
| PNS High Wycombe Limited | Real estate | 2021 |
| PNS Investments and Holdings Ltd | Real estate | 2020 |
| Policy Matters LLP | | 2010 |
| Polish N Poise Cleaning Limited | Administrative & support | 2026 |
| Poojathapar Ltd | Financial services | 2019 |
| POR Properties Ltd | Real estate | 2019 |
| Porky Whites Holdings Limited | Financial services | 2025 |
| Porky Whites Limited | Manufacturing | 2019 |
| Port Elizabeth Investments Ltd | Financial services | 2025 |
| Porter Ranch Limited | Health & social care | 2013 |
| Portland Commerce Limited | Real estate | 2018 |
| PORTS4 Holdings Ltd | Real estate | 2018 |
| Possible Pools Ltd | Arts & recreation | 2015 |
| Potamos Limited | Households | 2025 |
| Power Plumb Works Ltd | Construction | 2019 |
| Powersave Ltd | Construction | 2020 |
| Precision Systems Inc Limited | Information & communication | 2012 |
| Predilect Limited | Administrative & support | 2013 |
| Preet Construction Ltd | Construction | 2023 |
| Preevo Limited | Transport & logistics | 2020 |
| Premier Cares Services Ltd | Health & social care | 2026 |
| Premier Plumbing Group Ltd | Construction | 2024 |
| Premier Touch Services Limited | Administrative & support | 2015 |
| Premiere Domestic & Recruitment Services Limited | Administrative & support | 2019 |
| Premium UK Peptides Ltd | Wholesale & retail | 2026 |
| Premium Visa Consultants Ltd | Professional & scientific | 2020 |
| Prevention 1ST Fire Safety Advisory Services Limited | Professional & scientific | 2006 |
| Prevision Consulting Limited | Information & communication | 2004 |
| Pricketts Limited | Real estate | 1945 |
| Priestley Miller Financial Ltd | Financial services | 2025 |
| Primeground Services Ltd | Construction | 2022 |
| Primenest Trading Limited | Wholesale & retail | 2026 |
| Primesense Limited | Professional & scientific | 2001 |
| Principle Logistics Ltd | Transport & logistics | 2015 |
| Print Share Limited | Professional & scientific | 2021 |
| Print'N'Projects Limited | Administrative & support | 2014 |
| Priory CC35 Limited | Health & social care | 2019 |
| Priory CC73 Limited | Health & social care | 2020 |
| Privilege Watches Ltd | Wholesale & retail | 2023 |
| Pro Software Solutions Ltd | Information & communication | 2018 |
| Procar International Handling Limited | Transport & logistics | 2018 |
| Procar International Limited | Transport & logistics | 1996 |
| Product Fusions Group Limited | Construction | 2026 |
| Production Freight Limited | Transport & logistics | 2000 |
| Production in Partnership Ltd | Administrative & support | 2025 |
| Professional Roofing & Building Limited | Construction | 2025 |
| PROFESSIONAL1TWO1DETAILING Ltd | Administrative & support | 2023 |
| Progressbridge Engineering Limited | Information & communication | 2024 |
| Proguard Solutions Ltd | Wholesale & retail | 2025 |
| Projcon Group Limited | Administrative & support | 2009 |
| Projcon Holding Limited | Hospitality | 2025 |
| Project Evergreen Ltd. | Real estate | 2016 |
| Project Global Services Ltd | Administrative & support | 2024 |
| Project Recruit Consulting Limited | Other services | 2022 |
| Project Recruit Management Services Ltd | Professional & scientific | 2019 |
| Project Stargate Ltd | Information & communication | 2025 |
| Properties House Ltd | Real estate | 2022 |
| Property Strong Ltd | Real estate | 2023 |
| Protection Distributors Group | Other services | 2020 |
| Provigilant Limited | Health & social care | 2024 |
| Prowest Construction Ltd | Construction | 2025 |
| PRP Homes Ltd | Real estate | 2021 |
| PRP Tech Ltd | Information & communication | 2022 |
| Pspanesar Ltd | Health & social care | 2026 |
| PSS Shipping Services UK Ltd | Transport & logistics | 2022 |
| Ptoyce Limited | Information & communication | 2014 |
| Pulse Estates - 25 Edinburgh Drive Limited | Real estate | 2024 |
| Pulse Estates - 276 Bath Road Limited | Real estate | 2024 |
| Pulse Estates - 44 Clifford Road Ltd | Real estate | 2024 |
| Pulse Estates- 35 Whitton Road Ltd | Real estate | 2024 |
| Pupa Construction Ltd | Construction | 2014 |
| Purbeck Contracting Limited | Professional & scientific | 2017 |
| Pure Storage UK Limited | Information & communication | 2012 |
| Puretees Limited | Manufacturing | 2019 |
| Purple Lounge Staines Ltd | Hospitality | 2019 |
| Puttsnax Limited | Hospitality | 2026 |
| Puzzlebox Consulting Ltd | Information & communication | 2019 |
| Pwurban Ltd | Transport & logistics | 2019 |
| PX Corporation Ltd | Wholesale & retail | 2026 |
| Pyramid Analytics UK Limited | Information & communication | 2014 |
| Pythonanywhere LLP | | 2012 |
| Q Strategy Consulting Ltd | Professional & scientific | 2018 |
| Qcgc Consulting Limited | Professional & scientific | 2014 |
| QFD - Worldwide & U.K Logistics Ltd | Transport & logistics | 2019 |